Forced to work because her wastrel husband, Steve, prefers to gamble, seamstress Mary Maddock agrees to substitute for an ailing debutante at Mrs. Mallory's dinner in honor of oil magnate Nelson Rogers. She makes a hit, and--angered at Steve--she accepts Mrs. Mallory's invitation to visit for a few days. Steve persuades Pietro, the Mallory butler, to help him rob the Mallory safe; and Mary's scream of recognition awakes Nelson, who releases Steve and pays him blackmail money because he is Mary's husband. A quarrel between Steve and Pietro leads to Steve's death, Pietro's arrest, and future happiness for Mary and Nelson.